Real time measuring method and apparatus for horizontal directional drilling

Abstract

One kind of horizontal direction detection sneaks in along with drills the measuring technique and the equipment, uses in the horizontal direction detection sneaks in when the fact to survey underground drilling tool inclining, parameter and so on rotation and temperature, and the measurement result will transmit the ground through the transmitting coil by the radio magnetic wave way. The method use underground drilling tool interior along with drills in the metering equipment the inclination angle, the appearance angle and the temperature sensor surveys the corresponding parameter, after signal processing and transmission unit operation, use wireless launch unit to ground receiver real-time transmission. Its metering equipment has two sections of metals shells and center the compartment insulation shell seal becomes. In an end shell is loaded with the power source; The wireless radiating element installs in the insulator shell; Is loaded with electric circuit of board the signal processing and the transfer element, the inclination angle sensor, the appearance angle sensor and the temperature sensor sets in another end shell. The invention volume small, structure simple, cost inexpensive, the antijamming ability is strong, works reliably under the adverse circumstance, can suit the majority direction detection to sneak in the equipment request.

Description

technical field [0001] The invention relates to the field of trenchless horizontal directional drilling, in particular to a cable-free measurement-while-drilling method at the bottom of a hole and a measurement-while-drilling device designed by the method. Background technique [0002] At present, the non-excavation horizontal directional drilling pipeline laying method is widely used. It is a construction method that uses a special horizontal directional drilling machine to drill in different strata and depths with a controllable drilling trajectory to lay underground pipelines. In the process of horizontal directional drilling, attitude information such as inclination, azimuth, and rotation of the underground drilling tool must be obtained in real time, so as to guide the construction of the next stage in time. The acquisition of these information is accomplished through the measurement-while-drilling device. The measurement-while-drilling de...

AI Technical Summary

Problems solved by technology

Although this method does not require complex signal cables, the signal transmission speed is relatively slow. It takes tens of seconds or even several minutes to complete the transmission of a measurement, which cannot meet the requirements of real-time drilling measurement.

At the same time, due to the use of mud pressure pulses, the generation and identification of mud pressure pulses require high technology, and an additional action mechanism is required in the drilling tool, which makes the structure of the drilling tool complex and the cost is high

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